| Source | CRSP | Compustat | Thomson Refinitiv |
|---|---|---|---|
| CRSP | Linking within the CRSP Environment | CRSP/Compustat Merged (CCM) | MFLINKs for Mutual Fund Linking; Linking through CUSIP; 13F Linking Program |
| Compustat | CRSP/Compustat Merged (CCM); Using Compustat Historical Identifiers | Linking within the Compustat Environment using GVKEY | Link through CUSIP |
| Capital IQ | CIQ company ID linked to GVKEY and then to CRSP | Linking within Capital IQ | Link through CUSIP, ISIN or Ticker |
| IBES | IBES CRSP Link | Link through CRSP | Link through Security Mapping |
| Audit Analytics | Link through Compustat | Link through CIK Link (primary); Link through Ticker (secondary) | Link these two products using Compustat |
| BoardEx | Link with CRSP and Compustat | Link with CRSP and Compustat | TR Insiders Boardex Link |
| Bond: TRACE / Mergent FISD | Bond CRSP Link | Link through CRSP | Link through CRSP |
| Bureau van Dijk | Link through ISIN (CUSIP) for US Companies | Link through CRSP | Link through ISIN or SEDOL |